Coordinated by Pär Olsson, KTH (SE)
and Cornelia Heintze, HZDR (DE)
Domain 1 includes the modelling and experimental activities addressing the study of the formation and evolution of irradiation induced nano- and microstructure, as well as microchemical changes leading to a redistribution of alloying elements (Cr and C being in the focus). This domain features a strong component of innovative model development, by addressing the effects of magnetism and finite temperatures on the diffusion properties of the defects that drive the nanostructural evolution, foreseeing also both irradiation and postirradiation experiments using neutrons, self-ions and protons. The ion and proton irradiation conditions for the campaigns to be executed in M4F were already preliminarily defined within the framework of EERA JPNM pilot projects, in order to be comparable with or complementary to neutron irradiation conditions already achieved within the MATISSE project. The neutron-irradiated specimens will be provided as an in-kind contribution to the M4F project.
This domain is divided in two Work Packages
- WP2: Radiation-induced microstructure evolution, devoted to investigating how specific features of FeCrC alloys - model alloys for ferritic/martensitic (F/M) steels - influence and determine the microstructural changes induced in them by neutron irradiation, with a view to identifying the features that mainly cause low temperature hardening and subsequent embrittlement in F/M steels. This will be done by the development of advanced physical models to be combined with refined microstructural examination of irradiated materials
- WP3: Transferability of ion and neutron irradiation. The aim here is to put the use of ion irradiation as a neutron irradiation surrogate and screening tool for the development and qualification of innovative materials for irradiation environments on a more rational basis. This will imply developing suitable microstructure evolution models that explicitly take into account the specificities of ion irradiation, to be used to interpret correctly experimental results and, more importantly, guide their preparation and design. It will also require performing ad hoc ion irradiation campaigns, targeted to verifying specific hypotheses and validating the models